I/O monitor - like iptraf but for block devices ?

[Dennis Jacobfeuerborn]

Naoki wrote:
...
> NAME                  PID                    BLOCKS/W            BLOCKS/R      KB/s    FD    "FILE NAME"          DEVICE
> httpd                 4836			45		    1          53     13   /var/log/httpd/xxx    /dev/hda2
> And so on..
> 
> Diagnosing disk IO problems would be far easier if one had a tool that
> could give "at a glace" detail into what is doing what and where..
...

I'd like to see something like this too. Maybe Dave Jones could turn his 
"printk hack" (http://kernelslacker.livejournal.com/35270.html) into 
something usable by userland tools?

Regards,
   Dennis